Electric elevator.



Patented Apr. 8, I902.

ATTORNEYS A. M. MODRY. ELECTRIC ELEVATOR;

(Application filed Apt 10, 1901.) (No Model.)

Patented Apf. 8, 1902.

No. 696,994. A. M. MODRY.

ELECTRIC ELEVATOR. (Application fllmiApr. 10. 1901 (III) Modal.)

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Patented Apr. 8, I902. A. M. MOIJRY.

ELECTRIC ELEVATOR.

(Application flied Apr. 10, 1901.)

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(No Model.)

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UNTTT STATES PATENT OFFICE.

AUGUST MARTIN MODRY, OF BROOKLYN, NE\V YORK ELECTRIC ELEVATOR.

SEEGIFIGATION forming part of Letters Patent No. 696,994, dated April 8,1902.

Application filed April 10, 1901. Serial No. 55,130. (No model.)

To all whom it may concern:

Be itknown that LAUeUsr MARTIN MonRv, a citizen of the United States,and a resident of Brooklyn, county of Kings, and State of New York, haveinvented certain new and useful Improvements in Electric Elevators, ofwhich the following is a specification, reference being had to theaccompanying drawings, forming a part thereof, in which similar lettersof reference indicate corresponding parts.

This invention relates to improvements in electric elevators.

The nature and object of the invention will be fully understood from thefollowing general description and the annexed drawings and will besubsequently pointed out in the claims.

Figure 1 of the accompanying drawings is a vertical sectional view of mynewly-invented elevator, taken on the line y y of Fig. 2. Fig. 2 is ahorizontal sectional view of the same, taken on the line a: 00 ofFig. 1. Fig. 3 is a view of details of a modification more fullyhereinafter described. Fig. at is a diagram illustrating the electricalconnections, also more fully hereinafter described.

A designates the walls of the elevator-well. This well is to beapproximately of square transverse section, as illustrated in Fig. 2.In-each corner of this well are placed two vertical rows of rollers,(designated, respectively, by A and A These are arranged so that one rowis on each side of the angle formed bythe corner of the well, asillustrated in Figs. 1 and 2.

B designates the elevator carriage. On each of the four corners of thisis mounted a screw 0, each of which is journaled in bearings b and withits threads 0 engages the rollers A and A Upon the lower end of each ofthese screws is mounted a bevel-wheel c, which is fastened rigidlythereon, so that when it turns it will carry the screw O with it.

F designates the electric motor. This may be of any approved andadaptable construction. It is fastened to the bottom of theelevator-carriage by a sufficient support, as K. On the upper end of theshat'tf of this motor is mounted the bevel-wheel f.

E and E designate shafts running in the bearings g g and g g, which arefirmly fastened to the bottom of the elevator-carriage. There are fourof these shafts, which are set diagonally on the bottom of the carriageand extend from the motor in the middle to the screws on each corner. Onthe inner end of these shafts are mounted bevel-wheels f f which engagethe wheelf of the motor. On the outer ends of these shafts are mountedbevel-wheels 6 6 which engage the wheels 0 on the lower ends of thescrews 0.

N designates the electric generator, and H the switch for breaking,closing, and reversing the current. From the generator N the currentruns through the conductor n to the plate '5. On either side of thisplate 1' are placedthe plates '5 and 11 The plate 2" is connected by theconductor 7' to one side of the motor F. The plate 2' is connected withthe other side of the motor by the conductor 0. The motor itself isconnected with the generator N by the conductor 3, so that the circuitfrom the generator through the switch to the motor, through the motor,and back to the generator is complete. The plates 11, '5, and i are soinsulated that the current will not pass from one to the other until thecircuit is closed by the closer H 1-1. This closer consists of abifurcated plate H H, which is pivoted at h and is worked by the handleh. The distance between the two ends H and H is such that when themechanism is in the position illustrated in Fig. at neither side willtouch the plate 2', and so the circuit is not closed; but if the handleh, which is rigidly attached to the closer H H, be moved in thedirection indicated by the arrow the end H moving upward, will extendacross the space between the plates 2' and i, and so close the circuit.This will allow the current to pass through the conductor 1' and themotor and back through the conductor 3 to the generator. When thecurrent passes in this way, the motor will move and on account of theconnection of the mechanism hereinbefore described turn the screws 0.These, engaging the rollers A A with their threads, will carry thecarriage upward. When the carriage has reached the desired height, thehandle is returned to its original position. This returns the closer toits original position, the circuit is broken, and the mechanism stopsmoving. If the handle h be moved in a direction contrary to the arrow,it will cause the end H of the closer to move downward and close theconnection between the plates t' and 2' Then the current running throughthe connection 0 will enter the motor F on the other side and cause itto turn in the opposite direction. This will cause the carriage to movedownward, and so the carriage may be raised, lowered, or stopped atpleasure. The conductors n, 0, a", and 3 should be made of sufficientlength to reach through the whole extent of the excursion of thecarriage. The carriage should be provided with a proper door, as'm. Ifit be desired, it may also be provided with a counterweight, which maybe attached by a rope, as D, in any common and well-known way.

Fig. 3 illustrates a modification of my invention. In Figs. 1, 2, and 4the mechanism is illustrated as having two vertical rows of rollers ineach corner of the elevator-well; but in Fig. 3 the angle of theelevator-well is truncated, and upon the surface so produced there isset only one row of rollers for each corner to engage the screws on thecarriage; otherwise the mechanism is the same as is illustrated in Figs.1, 2, and 4.

To use my invention, all the various parts are to be assembledsubstantially as illustrated. The operator must also take care that themotor will produce acurrent of sufficient strength to actuate themechanism satisfactorily. Then apart from what has been hereinbefore setforth this elevator is to be used in the common and well-known way. Itwill be, however, found more safe than the elevator usually drawn up bya rope,

' for no matter where the carriage is stopped the threads of thecorner-screws, resting on the corner-rollers will prevent it fromfalling. It will also be found to work easily, smoothly, andnoiselessly.

lVhat I claim as my invention, and desire to secure by Letters Patent,is- 1. The combination with an elevator-well; pairs of vertical rows ofrollers j ournaled upon the walls thereof near the corners of said well,

i one row of each pair, having its journals arin both rows of one ofsaid pairs of rows; and mechanism for actuating said screws, to movesaid carriage, substantially as shown and specified.

2. The combination with an elevator-well; pairs of vertical rows ofrollers journaled upon the wall thereof, one row on each side of acorner thereof,nearsaid corner, and arranged so that the journals of therow on one side of the corner will be at right angles to the jou rnalsof the row on the other side of the corner; of a carriage adapted tomove in said well; vertical screws journaled on said carriage, and eachscrew adapted and arranged to engage the rollers in both rows of onepair of said rows of rollers; an electric motor fastened on the bottomof said carriage; mechanism connecting said motor with saidsc1'ews,whereby it is enabled to turn said screws, and move saidcarriage; and connections whereby said motor is supplied with anelectric current, all substantially as and for the purpose set forth.

3. The combination with an elevator-well; pairs of vertical rows ofrollers journaled upon the wall thereof, one row on each side of acorner thereof, near said corner,and arranged so that the journals ofthe row on one side of the corner will be at right angles to thejournalsof the row on the other side of the corner; of a carriage adapted tomove in said well; vertical screws journaled on said carriage, and eachscrew adapted and arranged to engage the rollers in both rows, of one ofsaid pairs of rows of rollers, an electric motor mounted upon the bottomof said carriage and moving therewith; mechanism comprising shafts andwheels, as specified, connecting said motor with said screws, andenabling itby turning said screws to move said carriage;

